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Add support for the attr() function in CSS content property values,
enabling patterns like `content: " (" attr(href) ")"` on ::before/::after
pseudo-elements. The implementation parses attr() at CSS parse time into
ContentValue::Items, then resolves attribute references against the DOM
during pseudo-element style computation, converting to ContentValue::String
before layout sees it.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
13 lines
206 B
HTML
13 lines
206 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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a { display: block; font-size: 16px; }
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a::after { content: " (" attr(href) ")"; }
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</style>
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</head>
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<body>
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<a href="https://example.com">Example</a>
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</body>
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</html>
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